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| Hauptverfasser: | , , , , , , , |
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| Format: | Preprint |
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2026
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| Online-Zugang: | https://arxiv.org/abs/2604.25436 |
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| _version_ | 1866910173327523840 |
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| author | Okuma, Ryutaro Fujisawa, Yuita Maekawa, Natsumi Nakao, Akiko Ishikawa, Yoshihisa Kobayashi, Riki Okada, Yoshinori Ueta, Daichi |
| author_facet | Okuma, Ryutaro Fujisawa, Yuita Maekawa, Natsumi Nakao, Akiko Ishikawa, Yoshihisa Kobayashi, Riki Okada, Yoshinori Ueta, Daichi |
| contents | CeTe$_3$ is a van der Waals antiferromagnet composed of magnetic [CeTe]$^+$ layers coupled to highly conducting Te$^{0.5-}$ square nets. Its simple quasi-two-dimensional electronic structure and cleavable nature make it an appealing platform for exploring correlated magnetism in reduced dimensions. To clarify the nature of its low-temperature state, we performed single-crystal neutron diffraction down to 0.3 K, complemented by scanning tunneling microscopy. A magnetic transition near 1.5 K gives rise to incommensurate Bragg peaks at $q_{\pm}\sim(\pm0.17,0,0.31)$, consistent with a double-$q$ magnetic order whose moments are predominantly aligned along the $c$ axis. The strongly reduced ordered moment is consistent with enhanced quantum fluctuations driven by $c$-$f$ hybridization, while the deviation of the propagation vectors from simple nesting suggests a coupling to residual charge-density-wave instabilities of the quasi-one-dimensional Te-derived bands. These results indicate that CeTe$_3$ hosts a correlated magnetic ground state where spin and itinerant charge degrees of freedom are intimately linked in the van der Waals limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_25436 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Highly fluctuating double-$q$ magnetic order in the van der Waals metal CeTe$_3$ Okuma, Ryutaro Fujisawa, Yuita Maekawa, Natsumi Nakao, Akiko Ishikawa, Yoshihisa Kobayashi, Riki Okada, Yoshinori Ueta, Daichi Strongly Correlated Electrons Materials Science CeTe$_3$ is a van der Waals antiferromagnet composed of magnetic [CeTe]$^+$ layers coupled to highly conducting Te$^{0.5-}$ square nets. Its simple quasi-two-dimensional electronic structure and cleavable nature make it an appealing platform for exploring correlated magnetism in reduced dimensions. To clarify the nature of its low-temperature state, we performed single-crystal neutron diffraction down to 0.3 K, complemented by scanning tunneling microscopy. A magnetic transition near 1.5 K gives rise to incommensurate Bragg peaks at $q_{\pm}\sim(\pm0.17,0,0.31)$, consistent with a double-$q$ magnetic order whose moments are predominantly aligned along the $c$ axis. The strongly reduced ordered moment is consistent with enhanced quantum fluctuations driven by $c$-$f$ hybridization, while the deviation of the propagation vectors from simple nesting suggests a coupling to residual charge-density-wave instabilities of the quasi-one-dimensional Te-derived bands. These results indicate that CeTe$_3$ hosts a correlated magnetic ground state where spin and itinerant charge degrees of freedom are intimately linked in the van der Waals limit. |
| title | Highly fluctuating double-$q$ magnetic order in the van der Waals metal CeTe$_3$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2604.25436 |